Combination oil and gas carburetor



May 18,1926. 1,585,443

G. w. VOLZ COMBINATION OIL AND GAS CARBURETOR Filed Oct. 8, 1924- a Sheets-Sheet 1 May 18,1926. w 1,585,443

G. w. VOLZ COMBINATION OIL AND GAS CARBURETOR Fil fl a, 1924 3 Sheets-Sheet 2 fm s/rmz 60772/55 lt. 1 042 G-OITLIEB W. VQLZ, OF LONG BEACH, CALIEQRNIA, ASSIGNOR, BY ME$NE ASSIGN- I IQTS, GE ENE? All)? T9 WILLIAM J. BGWZEAN, OE LOS ANGELES, CALIFQRNIA.

COMBINATION" OIL AND GAS CARBUBLETOE.

Application filed Gctoter 8, 1524.

l'rliy present invention is a combination device designed to effect a carbureting of air with either a gaseous or a liquid fuel; and it is an iniiportant feature of this inveni tion which comprises means whereby, when gas pressure drops, a carburetor supplying fuel. to a boiler, or the like, may automatically be fed with liquid fuel, and whereby any subsequent restoration of gas pressure s effective automatically to cut oil the supply of liquid fuel and to restore the flow of gaseous fu l; and the gas supply pipe may also optionally be so controlled. by a tomatio means, and concurrently with a control of steam, introducee as an entrain uient fluid, as to maintain a predetermined steam pressure, for use as required.

Other obje ts, including liquid fuel level control and preheating means, and an injector comprised in a novel carbnreting organization, and means for maintaining a pilotflame, and additional subsidiary fea tures hereinafter referred to, will be understood from the following description of an illijistrative embodiment of my invention, taken in connection with the appended claims and the accompanying drawings, in which-- Fig. 1 is a somewhat diagrammatic general elevational view showing the relationship of my novel carbureting device to a steam boiler plant in connection with which the same may be used.

Fig. 2 is a plan view of a typical carburetiug organization illustrating my invention.

Fig.3 is an elevational view which may be regarded as taken from the direction indicated by the arrow 3 of Fig. 2.

Fig. 4% is an elevational view, with parts in. section, showing the interior construction of a carburetor chamber provided with means for preheating oil to be used as a liouid fue, this element being hereinafter rererred to as an oil-conditioning regulator.

Figs. 5, 6 and 7 are sectional views showing diagrammatically certain details of carburetor construction and connections.

F 8 is a diagrammatic view illustrating the principles of operation of a boiler installation to which my invention may be appl ed. I

:ring to the details of that specific embodiment of my invention chosen forkpurposes of illustration, B may be a boiler or boilers, heated by the combustion of a fluid Serial no. 742,412.

fuel mixture piped thereto from a carburetor t7 and this carburetor may include an injector I connected both with a supply of steam, to serve as an entrainment fluid and with means for admitting either a combustible from a gas main M, or a combustible oil, from an oil main 0 (see Figs. 1 and S); and 11 may be an oil-conditioning regulator, within which oil may be preheated on its way to the carburetor C.

At 12 I may provide a steam-controlled gas feed regulator comprising a diaphragm D (see Fig. 8), connected with a rod l i adapted directly to open a gas valve V, to control the flow of combustible gas to a gas feed pipe 13; and the rod B may be pivotally connectedto a lever L, provided with means such as a link 14:, carrying a turn buckle 1 1, for the automatic adjustment of a balanced valve 15, through which steam, to serve primarily as an entrainment fluid may be supplied to the injector carburetor C, the construction here referred to being such that any diminution in steam pressure above. the diaphragm I) may serve simultaneously to increase the opening of both the valve V and the balanced valve 15, thereby increasing he flow of both gas and steam, with a consequent intensification of the flame projected beneath the boiler 13, to restore the steam pressure to predetermined level.

At 16, I show, in the path by which steam is delivered to the injector I, a fitting in the form of a cross providing a clean-out or inspection opening and having connection ting a flow of thereto from the main M, for the maintenance of a pilot flame beneath the boiler or boilers l3, even when gas pressure is low and optionally when steam is cut entirely of? from the injector 1"; and at 17 I show an automatic check valve adapted to prevent flow of gas, when pressure is high, into pipes by which preheated oil may alternately be fed to the oarlniretor C, to which the gas feed pipe 13 is also connected.

18 is an opening through which air may be admitted to the carburetor C, which is shown as comprising the central injector tube through which steam may "be ad mitted; and when gas is prevented, as by the closing .of the valve .20 having a hand wheel 20, or bya diminutionin gas'pressure in the main M, from 'enteringthe carihuretor C by "way of the pipe 13, the air T i alreaoy l.

liquid fuel advancing to the inl in consequence of a diminution in pressure above the check valve 17, as

the supply of steam or other entraind, through the balanced valve 15 re; and in order that no diminution as pressure shall result in of steam t main M, a check valve 19 may be interposed in the e 21, shown as provided also with a valve 21 inch va ally enter 'Jed.

Oil delivered through the conditioning regulator 11, or its equivalent, may be preheated by steam introduced into a lower compartment thereof by a pipe 32, this pipe l'ieing shown as provided with a regulaing hand valve 22, a separate pipe 23 being preferably employed to carry steam from the boiler B to the mentioned teed regulater 12; and heated oil delivered from the conditioning regulator 11 to an oil feed pipe 242, shown as provided with a regulating hand valve 2%" in addition to the mentioned check valve 17, may be thereby ted to the injector I of the carburetor C at a suitably elevated chamber, favorable to the efiicientcarbureting of the same.

The carburetor C may comprise a housing into which the mentioned air inlet 18 may be connected at right angles; and it may be closed at one end by a cap 26 hav iiug threaded engagement permitting relative adjustment, the outlet end ot the housing being connected with a piper or pipes 2? through which the carbureted mixture may be delivered to burners b neath the boiler or boilers B, The carburetor C may comprise also an injector nozzle 30, shown as provided with a constriction 30 and toward which may extend the exit end oi a pipe 81, shown as adjustable therein by the rotation of a hexagonal body 81. and to which steam orgas may be admitted from the mentioned cross, connected with the balanced valve 15 by means of the pipe 15.

Oil to be delivered from the regulator ll, or its equivalent, to the carburetor C, as by way of the pipe 24, may be fed to said regulator by an inlet pi 3e 32 shown, as extending upwardly through a partition 32- which serves to confine a steam chamber into which the mentioned steam pipe 22 extends; and means such as a float 34, having a rod 35 shown as extending through the inlet pipe 82 may be provided in a steam-heated float chamber 34:, the lower end of the rod being shown as provided, with shall 36, fitting a seat 37, automatically to maintain a predetermined level in the pipe 24, or its equivalent, relatively to the carburetor C; and in order to maintain the parts of this carburetor in their adjusted relationships, 1

may provide the threaded connections therebetween with locking means such as the nuts 40, ll, the former engaging the cup 26, and the latter engaging a bushing 48 by which the ejector pipe 31 may be centered within a cross 49 with which the gas feed pipe 18 and the oil feed pipe 2% are respectively connected; and the same steam which is used in the preheating of oil within the float chamber 3 L may optionally be fed through the balanced valve 15, as by means o1" a connecting pi )e 47, optionally provided also with a regulating valve having a hand wheel 47. The exit end of the pipe 31 may be pro d liiest shown in l G and '7,

slot 4 9, adapted to impart a with inclined whirling motion to the oil or gas entrained by the steam or other fluid delivered under pressure therethrough; and it will be obvious that tile delivery or non-delivery of oil by way of the oil feed pipe 24 containing the check valve 17, assuming a suitable flow of steam, or the like, through the pipe 31, vi ill be dependent upon whether or not the pressure of gas in the gas feed pipe 31 (which pressure may be dependent upon that in the main M, assuming the valve V to be kept open by afall in the boiler pres sure) is so low as to permit the upward opening of the check valve 17. Thus, when the gas pressure in the main M is adequate steam pressure may be maintained by the burning of gas; and whenever the gas pressure in the main M falls below a predetermined value, preheated oil may be automatically fed as an alternative fuel, to maintain a predetermined boiler pressure and to provide steam for any engines or other machinery which ma y be supplied therewith, as through the pipe 50, or its equivalent. During the burning of gas, it will be obvious that my invention provides means for the simultaneous and automatic regulation of the feed of gas and steam to my carburetor; and the alternative connections including the pipe .11 provide means for the maintenance of a pilot flame even when the oil supply and the steam supply to the carburetor areentirely out off.

Although I have herein described a single embodiment oi my invention, it will be understood that various features thereof might be independently employed, and also that additional modifications might be nude by those skilled in the art, without the slightest departure from the spirit and scope of my invention, as the same is indisated above and in the following claims.

I claim as my invention:

1. A system for the maintenance of steam pressure comprising: a boiler; means for burning a carbureted mixture thereunder, a carburetor provided with both a fluid fuel feed pipe and a gaseous fuel supply pipe, as well as nozzle for the delivery of an en- Ill) hainnicnt fluid; and means comprising a balanced valve, responsive to steam pressure, for controlling the flow of said entrainment fluid to said carburetor so substantially to compensate for deliriencies in the delivery of said gaseous fuel thereto 2. A system for the maintenance of steam pressure comprising: a boiler; means ior burning a carbureted mixture thereunder; a carburetor provided with both a fluid fuel feed pipe and a gaseous fuel supply pipe, as well a nozzle for the delivery an entrainment fluid; and means comprising a balanced valve responsive to steam pressure, for controlling the flow of said cntrainn'ient fluid to said carburetor: said balanced valve being mechanically interconnected with means for controlling a fluic fuel supply to said carlmretor, and said fluid fuel feed pipe being provided Wits means to prevent undesired advance of therethrough at times of high pressure.

3. A system for the maintenance or" steam pressure comprising: a boiler; means for burning a carbureted mixture thereunder; a carburetor provided with both a fluid fuel feed pipe having a valve and gaseous fuel supply pipe, as well as a nozzle for the delivery of an entrainment fluid; and means whereby a fall in steam pressure may cause a simultaneous opening; of said valve in said fluid fuel feed pipe and an increased flow of said entrainn'ient fluid to said carburetor.

In testimony whereof, I have hereunto set my hand at Los Angeles, California this 1st day of October, 1924.

GOTTLIEB Vi. VOLZ. 

